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https://issues.apache.org/jira/browse/MAPREDUCE-5970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14172662#comment-14172662
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Jason Lowe commented on MAPREDUCE-5970:
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+1 lgtm.  Committing this.

> Provide a boolean switch to enable MR-AM profiling
> --------------------------------------------------
>
>                 Key: MAPREDUCE-5970
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5970
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: applicationmaster, client
>    Affects Versions: 2.4.1
>            Reporter: Gera Shegalov
>            Assignee: Gera Shegalov
>            Priority: Minor
>         Attachments: MAPREDUCE-5970.v01.patch, MAPREDUCE-5970.v02.patch, 
> MAPREDUCE-5970.v03.patch
>
>
> MR task profiling can be enabled with a simple switch 
> {{mapreduce.task.profile=true}}. We can analogously have 
> {{yarn.app.mapreduce.am.profile}} for MR-AM



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